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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Calculator</title>
<style>
body {
font-family: Arial, sans-serif;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
background-color: #f4f4f9;
}
.calculator {
background-color: #fff;
padding: 20px;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.display {
width: 100%;
height: 50px;
margin-bottom: 20px;
background-color: #222;
color: white;
font-size: 2rem;
text-align: right;
padding: 10px;
border-radius: 5px;
border: none;
}
.buttons {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 10px;
}
.buttons button {
padding: 20px;
font-size: 1.5rem;
border-radius: 5px;
background-color: #f0f0f0;
border: 1px solid #ddd;
cursor: pointer;
}
.buttons button:hover {
background-color: #d0d0d0;
}
.buttons button:active {
background-color: #b0b0b0;
}
.equal {
background-color: #4CAF50;
color: white;
}
.clear {
background-color: #f44336;
color: white;
}
</style>
</head>
<body>
<div class="calculator">
<input type="text" class="display" id="display" disabled>
<div class="buttons">
<button onclick="appendToDisplay('7')">7</button>
<button onclick="appendToDisplay('8')">8</button>
<button onclick="appendToDisplay('9')">9</button>
<button onclick="appendToDisplay('+')">+</button>
<button onclick="appendToDisplay('4')">4</button>
<button onclick="appendToDisplay('5')">5</button>
<button onclick="appendToDisplay('6')">6</button>
<button onclick="appendToDisplay('-')">-</button>
<button onclick="appendToDisplay('1')">1</button>
<button onclick="appendToDisplay('2')">2</button>
<button onclick="appendToDisplay('3')">3</button>
<button onclick="appendToDisplay('*')">*</button>
<button onclick="appendToDisplay('0')">0</button>
<button onclick="appendToDisplay('.')">.</button>
<button onclick="clearDisplay()" class="clear">C</button>
<button onclick="appendToDisplay('/')">/</button>
</div>
<button onclick="calculateResult()" class="equal">=</button>
</div>
<script>
// Function to append the clicked button value to the display
function appendToDisplay(value) {
document.getElementById('display').value += value;
}
// Function to clear the display
function clearDisplay() {
document.getElementById('display').value = '';
}
// Function to calculate the result of the expression in the display
function calculateResult() {
try {
let result = eval(document.getElementById('display').value);
document.getElementById('display').value = result;
} catch (error) {
document.getElementById('display').value = 'Error';
}
}
</script>
</body>
</html>
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